US2910973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable compression ratio type engine
Assignee: Individual
•
Filing: 1955-09-15
•
Granted: 1959-11-03
•
Expires: 1975-09-15
Abstract
No abstract record available.
Inventors
- 👤 Julius E Witzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:56
CPC Classifications
F; F01; F01B; F01B7/00; F01B7/02; F01B7/14; F02; F02B; F02B75/00; F02B75/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1025251A
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US1189312A
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DE476625C
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FR732073A
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US2332618A
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US2647498A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |